Again, many people have this misconception about emerging markets, China, SE Asia, etc. People like you think that you must bring cheap goods for these market. This is contrary to the reality. The rising middle class in these markets are aspiring for the high end goods. Go to Japan and look how many Chinese tourists buying iPhones. Even Samsung knows this. Samsung opens pre-orders for their Note 7, not a cheap phone, in countries like Indonesia, and they are sold out in a blink of an eye. Apple has not even released the SE in Indonesia, and the old iPhone 6 are still selling.Apple has had two quarters of declining unit volumes for iPhone, so no growth is not a myth. Unit sales will bounce between negative growth to slightly positive, in tandem with new models and replacement cycles. But long-term growth is gone. Developed nations are saturated, emerging markets including China have pivoted to lower-cost alternatives. Apple will have to go down-market if it wants to see material unit growth.
You only look at unit sales. Apple is not playing the volume game to the likes of Acer/Asus. Apple is playing the margin game, which is more sustainable in the long term. You think that to enter emerging markets, you have to cater to all segments. Not true. I take Indonesia as an example again, where Ferrari and McLaren are opening showrooms in malls. It makes no sense based on your logic of the market going to lower cost alternatives. Apple is not Lenovo/Xiaomi.